The weighted average of the possible values that a random variable X can assume,where the weights are the probabilities of occurrence of those values,is referred to as the:
A)variance.
B)standard deviation.
C)expected value.
D)None of these choices.

Question

Quizplus · Accepted Answer

The definition provided in the statement matches that of expected value, which is also known as the mean of the probability distribution of X. Variance and standard deviation are measures of the spread of the distribution around the expected value, but they do not represent the expected value itself. Therefore, choices A and B are incorrect.

The Weighted Average of the Possible Values That a Random